How to solve the problem with set(), get()?

Question

Java

Book: id, title, author(s), publisher, year of publication, number of pages, price, type of binding.
Create an array of objects. Display a list of books sorted by author.
Help really needed!!

Answer 1

Take out from where? If from the database, then look towards active record and data mapper (repository) - the latter is better. There are ready-made interfaces: JPA
Setters and getters of variables will not help you in any way, as they give access to the properties of your business entity (and generally make it a structure), but how they are filled is not a matter of this object (except for the Active Record pattern), exactly as well as the output of a collection of these objects, and definitely not sorting.